20403721880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{821}}^1\times {\mathrm{14449}}^1$

素因数の和:15324

約数の個数: 64

約数和(自身を含む): 47036484000

約数和(自身を除く): 26632762120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 821, 860, 1642, 1720, 3284, 4105, 6568, 8210, 14449, 16420, 28898, 32840, 35303, 57796, 70606, 72245, 115592, 141212, 144490, 176515, 282424, 288980, 353030, 577960, 621307, 706060, 1242614, 1412120, 2485228, 3106535, 4970456, 6213070, 11862629, 12426140, 23725258, 24852280, 47450516, 59313145, 94901032, 118626290, 237252580, 474505160, 510093047, 1020186094, 2040372188, 2550465235, 4080744376, 5100930470, 10201860940, 20403721880]

約数ペア:

[(1, 20403721880), (2, 10201860940), (4, 5100930470), (5, 4080744376), (8, 2550465235), (10, 2040372188), (20, 1020186094), (40, 510093047), (43, 474505160), (86, 237252580), (172, 118626290), (215, 94901032), (344, 59313145), (430, 47450516), (821, 24852280), (860, 23725258), (1642, 12426140), (1720, 11862629), (3284, 6213070), (4105, 4970456), (6568, 3106535), (8210, 2485228), (14449, 1412120), (16420, 1242614), (28898, 706060), (32840, 621307), (35303, 577960), (57796, 353030), (70606, 288980), (72245, 282424), (115592, 176515), (141212, 144490)]